Biggest Loser contestants Koli Palu and Ashley Johnston have reportedly revealed that they are dating.

The pair competed at the ranch together on the last season of the NBC weight-loss competition.

Speaking to People, Johnston said: "Koli and I are dating now. Being on the show together you see the good, the bad and the ugly. We saw each other at our worse. I think it made us even closer."

The 29-year-old went on to say that the couple, who began their relationship as friends, are having a long-distance relationship because she is based in Tennessee while Palu lives in California, but insisted that they frequently see each other and talk on the phone and Skype.

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"I don't think he has a desire to move to Tennessee," she added. "But I've been to San Francisco and I love it."

Palu, who won last season's at-home prize, previously toldDigital Spy that Johnston had been one of his "biggest supports" during his time on the show and credited her with helping him succeed in the experience.